Fuel-economizing apparatus.



E. F. CLARKE.

FUEL ECONOMIZING APPARATUS.

APPLICATION FILED FBB.24, 1913 1,073,795, Patented Sept. 23, 1913.

6 SHBETS-SHEET 1.

FIG 1 LULUMUIA ILANDGRAPH C(L, WASHINGTON, D4 Lv E. P. CLARKE. FUEL EGONOMIZING APPARATUS.

APPLICATION FILED PEB.24, 1913.

SBHBET 2.

Patented Sept. 23, 1913.

.FIG 6 B. F. CLARKE.

FUEL EGONOMIZING APPARATUS.

APPLIOATIDN FILED IEB.24, 1913.

1,073,795. Patented Sept. 23, 1913.

5 SHEETS-SHEET 3.

COLUMBIA PLANDGRAPH c0, WASHINGTON, 0 C.

E. F. CLARKE.

FUEL EGONOMIZING APPARATUS.

APPLICATION FILED rnB.24, 1913.

1,073,795. Patented Sept. 23, 1913.

5 SHEETS-8112134.

FIG 5 3.273 l 1 I UL f I B. F. CLARKE. FUEL BGONOMIZING APPARATUS.

APILIOATION FILED 118.24, 1913. 1,073,795. Patented Sept. 23, 1913.

6 SHEETS-SHEET 6.

EDWARD FUHBMANN CLARKE, 0F BIRMINGHAM, ENGLAND.

FUEL-ECONOMIZING APPARATUS.

Specification of Letters Patent.

Patented Sept. 23, 1913.

Application filed February 24, 1913. Serial No. 750,306.

To all whom it may concern Be it known that I, EDWARD FUIIRMANN CLARKE, a citizen of Great Britain, and a resident of 5 Temple Row, Birmingham, county of Warwick, England, consulting engineer, have invented certain new and useful Improvements in Fuel-Economizing Apparatus, of which the following is a specification.

This invention comprises improvements in smoke consuming and preventing, and fuel economizing apparatus for furnaces and the like, and relates to the type of apparatus in which controllable openings are arranged in the furnace door and are opened by the action of opening the door for stoking and are gradually permitted to close under the influence of a spring or the like which is opposed by a suitable resistance.

The object of these arrangements permit the entry of additional air to the combustion of the heavy carbon given off from the fuel immediately after stoking and to gradually out off this additional air supply when the more volatile gases have been given off by the fuel and burned. The arrangements therefore prevent smoke and consume and obtain the additional heat from the volatile gases, which form or assist in forming smoke, thus in addition to preventing a nuisance, economy in fuel consumption is obtained.

l/Vith the above and other objects in view the invention consists in general of certain novel details of construction and combination of parts hereinafter fully described, illustrated in the accompanying drawings, and specifically claimed.

On the drawings: Figure 1 is an elevation of the front casting of a furnace front of a boiler with my invention applied. Fig. 2 is a section on line 2-2 of Fig. 1 looking to the left. Fig. 3 is a section on line 4i-4l of Fig. 1 looking to the left. Fig. 4 is a similar view to Fig. 1 but with the air inlets closed. Fig. 5 is a part sectional view to a larger scale showing the preferred braking means. Fig. 6 is a cross sectional View on line 6-6 of Fig. 5. Fig. 7 is a cross sectional view on line 7+7 of Fig. 5, and Fig. 8 is a cross sectional view on line 8+8 of Fig. 5.

In my invention I arrange an opening or openings 0. in the furnace door I) and provide pivotal closing flaps c for these openis to effect gases mgs. To enabl the closing flaps to make a tight closure I form beads or ribs (Z around the openings (1. and extend the bottom rib of each beyond the upper one and incline the surfaces of both to the same angle to the vertical, see Fig. 2. If the flap c of each opening a is pivoted above the upper bead (Z thereof, the main body of the flap is to the side of this center and is maintained by its own Weight tightly against the surfaces surrounding the openiug, see Fig. 3. The openings a and flaps c are preferably horizontal and the flaps may be mounted by means of lugs a through which a hinge pin f passes into lugs 9 on the door 0. The lug e on one side of each flap is preferably longer than the other, and is provided with a crank it fitted with a pin i. A vertically moving connecting rod y is provided for simultaneously operating the flaps, see Figs. 1, 2, and 3; and for this purpose it is connected to the crank pins 6 of the flap cranks 7i, so that by raising the bar the cranks it are rotated and the flaps c raised to admit air through the openings.

To rotate the cranks 71 to operate the flaps I connect the rod y' to a crank 71: which is mounted on a short axle or stud in a bearing lug Z on the door I). On the other end of the stud is a second crank in which is provided with a roller n which rests upon the surface of a cam 0 keyed to a spindle 7) working in a bracket 9 on the door frame or castin On the cam o is a projection 7' which is brought around to bear against a projection s on the upper hinge strap 1? of the door 6 by the action of a weight n (or may be by a spring), see Fig. 4E.

The bracket has a platform 1) through which the spindle 7? projects, and upon the spindle above this platform a disk to is socured carrying a pawl 01; which is adapted to engage with a ratcheted disk 7 on a gear wheel 2 mounted in bearings from a second platform Z and thus quite independent of the spindle p or its disk to, see Fig. 5. The gear wheel 2 is the first of a multiplying train the wheels of which are numbered respectively to their driving relation .2, 2, 8, 1, 5, 6, 7, and 8, the final pinion 8 being keyed on the spindle 9 of a fan. The gear train will be understood from reference to Figs. 5, 6, and 8, but any suitable multiplying gear may be used.

. It will be seen that the gearing and the fan r inclosed Wi in a clus pro f casing 10 secured upon the platform o of the bracket The operation of the device is as follows: As the door 6 is opened for the Charging of the furnace the projection s carries around the cam 0 from the position shown at Fig. 4, thus turning the spindle 79, and its disk to also, but the pawl 00 simply clicks around the ratchet y. The rotation of-the cam 0 raises the weight it and the tendency is to instantly return the cam when the door closes. Thus far the door Z) with hearing Z and crank m and its roller n have simply turned around with the cam as the hinge strap t has rotated on the door hinge pin to turn the cam. When the door 79 is closed the strap t of course turns in the reverse direm tion' and brings back the projection s, and cam 0 under influence of the weight tends to follow the projection s but is prevented by the pawl m engaging the ratchet g and thus connecting the cam through the gear train to the fan. The cam is thus retarded while the door returns, and therefore the roller a travels around the surface of cam 0 and encounters the raised path 11 which it rides up to the position shown in Fig. 1 thus rotating the cranks m, it, and through the connecting rod the cranks [2. also, thereby raising the flaps c which cover the air inlets a.

The fan traveling at a high speed and do.- ing' work by circulating air Within the case or cover 10 brakes the action of the weight upon the cam o and the return of the cam and consequent closing of the inlets is very gradually efiected as is desired.

I prefer to provide means to enable the resistance offered by the fan to be regulated, and these may be as follows: The fan shown at Figs. 5 and 7 is a bladed fan 12 rotating in a volute casing 13 with a cover plate lt having a central opening 15'for the purpose of providing a feed and an opening in the casing for delivery at 16 *5), By closingthe feed opening 15; or delivery opening 16 no air is transmitted to the fan which is consequently relievedof work and the blades rotate at a higher speed, and the weight a is permitted to. be rapid in its action. The reverse action enables air from within the cover 10. to be drawn into the fan and blown out throu h opening 16 up to the space at the top. of the cover 10. again and is thus circulated and the work entailed increases the resistance toqthe action of the weight at, and entails slower closing of the flaps 0-.

Between these. two. positions- I am able to.

obtain considerable degrees of regulation so that the operation of the flaps may be suited to circumstances such. as. the nature of the fuel etc. For closing the. opening 15. I have shown a valve plate 1'5 operated by a screw 18 through the case 110, the screw '18 having a spool or handle member 19" fixed thereto, which handle member is exterior to he c se 1 It is desirable to provide means to insure a regular period of opening of the flaps 0 or inlets a independent of the care of the attendant opening the door 6. To this end I provide a raised rib 19 on theplatform 11 around disk w this rib has a shaved oil end at 20 see Fig. 6, and its function is to receive and depress the tail'of the pawl so when the door 6 is swung open beyond a certain point. AS, the door springs open the disk to and its pawl m travel in the direction of the arrow (Fig. 6. i se iona plan) and after the point 21 of the rib 19 is reached the t il of the pawl is, depressed to such an. X: tent that the nose is Clear of the ratchet teeth y. Thus when the door is closed the disk w and cam 0- are permitted to turn with it under theinfiueuce o h ight 14, u t the pawl m returns pas th point 21. 0f h rib again, when it is permitted to click into ngagemen ith th atch t, and the opera n s thenass t out a o e.

What I claim then is: f

1. The combination with a furnace do provided with a damper opening, and a closure for said opening; of a clockwork mechanism arranged to he wound by the' pening of the door, means controlled by the clock work mechanism and arranged to open the damper as the door is returned to closed po: sition, said last mentioned means being moved by the clock work mechanism to close the damper after the door is closed, and a governor connected to said clock work mechanism to regulate the speed thereof, said governor including a fan and manually op erable means for varying the resistance of the movement of said fan.

2. The combination with a clock work mechanism for automatically closing a damper of a governor for such mechanism op-. erably connected thereto, and comprising; a fan, a volute casing surrounding said fan and having an inlet opening at one side, and p a movable closure plate to open and close said inlet opening.

3. The. combination with a furnace door provided with a damper; of a clock work mechanism arranged to. be wound by the opening oft-he door and controllingthe op.- eration. of said damper, a governor for said mechanism, and means whereby the gov-v ernor is; operably connected to the mechanism at a predetermined position of the door whereby said damper remains open for a period of time independent of the opening of said: door beyond said position.

l. The combination with a furnace door provided with a damper, of an element 3,1'1 ranged to be. rotated by the opening of the door, of a pawl carried by said element, a atchet jiournaled' for rotation and adapted for engagement by the pawl, a gear train op- In testimony whereof I aflix my signature erably connected to the ratchet and controlin presence of two witnesses.

ling the closing of said damper, and means adjacent the path of the pawl permitting EDWARD PUHRMANN OLARKL' engagement of the pawl with the ratchet un- Witnesses: td a predetermined point 1n its movement is F. GILBERT BRETTELL, reached. E. DAWSON IIMmOASTLn.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, I). G. 

